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Research Article | Open Access

Hot forging Nb4AlC3 ceramics with enhanced properties

Ye Yua, Shuai Fub, Detian Wanb, Yiwang Baob, Longsheng Chua, Qingguo Fenga, Chunfeng Hua( )
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
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Abstract

Textured Nb4AlC3 ceramics were rapidly and efficiently prepared by hot forging through spark plasma sintering (SPS). The longitudinal compression ratio of textured Nb4AlC3 ceramics was −78.3%, and the lateral expansion ratio was 32.1%. The grains grew preferentially along the direction perpendicular to the c-axis, forming the texture microstructure. The Lotgering orientation factor f(00l) was calculated to be 0.63. The thermal conductivity of textured Nb4AlC3 ceramics along the c-axis direction (11.23 W·m−1·K−1) (25 ℃) was lower than that of untextured ceramics (13.75 W·m−1·K−1) (25 ℃). The electrical conductivity perpendicular to the c-axis direction reached 4.37×106 S·m−1 at room temperature. The ordered layered grains increased the resistance of crack propagation, resulting in a higher fracture toughness parallel to the c-axis direction (9.41 MPa·m1/2), which was higher than that of untextured ceramics (6.88 MPa·m1/2). The Vickers hardness tested at 10 N on the texture top surface (7.18 GPa) was higher than that on the texture side surface (6.45 GPa).

Keywords

Nb4AlC3textureanisotropymicrostructureproperties

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Journal of Advanced Ceramics
Volume 12 Issue 11,
November 2023
Pages 2032-2040
DOI: 10.26599/JAC.2023.9220805
Cite this article:
Yu Y, Fu S, Wan D, et al. Hot forging Nb4AlC3 ceramics with enhanced properties. Journal of Advanced Ceramics, 2023, 12(11): 2032-2040. https://doi.org/10.26599/JAC.2023.9220805

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Received: 09 July 2023
Revised: 05 September 2023
Accepted: 05 September 2023
Published: 29 November 2023
© The Author(s) 2023.

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